Exhaust-valve mechanism for explosive-engines.



' PATENTEDJUNE 18, .1907,

G. M. BEARD.- EXHAUST VALVE MECHANISM FOR BXPLOSIVE EN GINES.

APPLICATION FILED JAN. 17, 1905.

U ITED sr p s r gENT oErroE.

GEORGE Mi BEARD, or WARSAW, INDlIANA. EXHAUST-VALVE MECHANISM FOR EXPLOSIIVE-ENGVINES.

Specification of Letters Patent.

Patented June 18, 1907.

Application filed January 17, 1905- vSerial 116241.491.

To all whom it may concern.-

' hydrocarbon gas engines and it consists in 'end' cf'the instroke o puts the said chamber inv communication 'with the exhaust so asto allow the outlet the novel construction and arrangement of its parts as hereinafter shown and described.-

The object of the invention is to provide exhausts for the character of engines as indicated, the parts of the exhaust being so arranged that when the working piston arrives at'the end of the outward stroke a port is opened which permits the gas under ressure to enter a chamber behind a piston ead located therein, in such a manner as to move the said piston head and open the; exhaust valve whereby the burned chargein the engine cylinder may be expelled by the working A piston on its instroke. piston is provided 'at a certain point with an The said working adjustable valvular apfplifince wllgligh'at the t e wor g piston port of the engine cylinder to close.

In the accompanying drawing, the figure is a longitudinal sectional View of a hydrocarbon engine showing an exhaust valve attached thereto.

The engine consists of the cylinders 1 and 2, in which are adapted to reciprocate the pistons 3' and 4, respectively. The inner ends. of the pistons 3 and 4, are attachedto the yoke 5. The sliding block 6, is located within said yoke and the crank shaft 7, passes through said sliding block. The housing 8,

connects the inner ends of the cylinders 1 and 2, together and incloses the yoke. 5. Each of the cylinders land 2 is'provided at its end with a sparking plug opening 9, and each of the said cylinders is also provided with a gas inlet port 10, which is normally closed by a valve 11. A passage/.12, leads down from the outer end of each of the cylinders 1 and 2, and communicates by means of an opening 13, with exhaust port 14. The valve 15, is adapted to close against the opening '13.

The stem 16, of said valve -15, extends into the chamber 17. A piston 18 is located in the .chamber 17, and a coil spring 19 is interposed between the piston 18, and the end wall of the chamber 17, and surrounds the stem 16. The passage 20, connects one end of the chamber 17, with the interior of the cylinder, while the passage 2 1, enters the cylinder at one end and the exhaust outlet 14, at its other end. Each of the pistons 3 and 4, is provided with. a groove 22, which at the .Presunnng that the parts are in the position as shown in the figure, and the pistons 3 and 4, are about to move in the direction'as indicated by the arrow, as the piston 4-, moves within the cylinder 2, .the charge of air and gas is drawn into'the said cylinder 2, through the inlet port 10.. When the piston 4, arrives at the end of the stroke, it immediately begins to move in the opposite direction and compresses the charge drawn into the cylinder 2. The said charge is ignited at the pro per'tiine and the piston 4, again moves in the direction as indicated by the arrow.

tion'enters the said passage and passes into the chamber 17, behind the piston 18, thereof. The saidpiston 18 moves in the chamber 17, and through the valve-stem 16, the valve 15, is moved, away from the opening 13. Thus the burned gases from the cylinder 2, may pass down, through the passage 12, through the opening 13, and out through the exhaust out et 14. As. the piston 4,

moves toward the head of the cylinder 2, the valve 15, is held open by the burned gases confined in the chamber 17 behind the piston 18 until the groove 22 comes over the upper ends of the passages .20 and 21, when the gases confined in the chamber 17, behind the 'piston'lS, pass up through the passage 20, through the groove 22, and down through the passage 21, into the exhaust outlet 14. As thesaid gases pass out the spring 19, moves the piston 18, back and closes the valve 15, against. the opening 13, when the operation above .-described' is re eated.

'As illustrated in c amber 17, under the cylinder 1, the wall of said chamber 17 may be provided with an opening 23', which leads directly from said chamber intothe passage When the end of the piston 4, passes over the passage 20, a part of the product of combusthe piston 3, may pass directly through said' opening into the passage 21.

As shown in the drawing the piston 3, is providedin its side with a longitudinal adustable section 24, which is provided with a groove shown in the cylinders 3 and 4, of

the figure. This section 2.4, may be adjusted back or forthby loosening thebolts 25, which secure it to the piston 3, and byso doing the groove 22.,

It isunderstood that the said section 24, may be so located as to cause the groove 22, to pass over the ends of the passages 20and 21, before the working piston arrives at the extreme end of its exhaust stroke so as to give more time for the gases back of the piston 18. to escapethrough the passages 20 and 21.

Having described my invention what I 'ton located in said. chamber andadapted to be moved by' the pressure of the explosion gases and thereby open the cylinder outlet at the end of the working pistons outstroke, and an adjustable valvular appliance moving with the work ng piston which at the, end of may be moved to accommodate. high or low speed engines.

the instroke puts the said chamber in communication with the exhaust, so as to allow the outlet port valve to close. In testimony whereof I aflix my'signature, in presence of two subscribing witnesses.

GEORGE M. BEARD.

\Vitnesses I. LovENBEnG, EDWIN BRUCE. 

